Answer:
During photosynthesis, a green pigment called chlorophyll is required to absorb solar energy. The reaction in photosynthesis that requires pigments to absorb solar energy is called LIGHT REACTION.
Explanation:
Light reaction is considered to be the first stage or phase during photosynthesis and the key elements that is needed for the reaction to take place is- sunlight and chlorophyll. Chlorophyll is a pigment that makes the leaves of the plant appear green. There is also another important function of chlorophyll that is to trap solar energy during the process of photosynthesis to convert the trapped solar energy into chemical energy- ATP molecules. These ATP molecules then form glucose- food for the plant.
Why does the cell membrane of the tube worm stop the flow of excess salt into its body?
To maintain a stable environment
The cell membrane of tube worm cells is selectively permeable, preventing minerals in the water from flowing into the cells. The cell membrane thus protects the cell from osmotic damage. By selectively preventing these minerals, the cell's environment is kept stable.
What is cell membrane ?The cell membrane, also known as the plasma membrane, is found in all cells and serves to separate the cell's interior from the outside environment. The cell membrane is made up of a semipermeable lipid bilayer. The cell membrane controls the transport of materials into and out of the cell.
The ease with which a molecule can pass through the cell membrane is referred to as the cell membrane's permeability. It also refers to the rate of passive diffusion through the cell membrane.
Cell membranes function as both barriers and gatekeepers. They are semi-permeable, which means that some molecules can pass through but others cannot. Small hydrophobic molecules and gases, such as oxygen and carbon dioxide, rapidly cross membranes.
Thus, The cell membrane of tube worm cells is selectively permeable, preventing minerals in the water from flowing into the cells.
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